IKcco Opener (O-based)

When J comes later than O, O has to be placed first.

First bag

Second bag

1

Like regular IKcco, if L comes before S, you can stack a donation TSD.

2

If the first path is not possible, you can try to stack a TSD by placing S at the right corner.

3

With an early ZIJ, you can spin a TSS to setup STSD.

4

If I comes last, setup a donation TSD which comes with another TSD chance.

5

With an early O, it is possible to setup donation TSD.

6

Go simple with side four-wide.

Third bag

1-1

You have 97.58% (4918/5040) chance to achieve a perfect clear.

Most of the time, you can stack like this using T + Z/S:

By utilizing soft drop, hold, and spins, you can stack these patterns with some weird queues e.g. OISZTJL / LOZTJSI.

If you have to place the L piece early and J comes late:

If the last piece is Z or T, you can always stack this shape:

Deal with early ZS:

The special case when S comes last:

1-2

CC Cannon

A donation version when O comes too late

1-3

TST

1-4

Yoshihiro